I want to build a dipole for 80M....lots of ideas out there.... straight wire...folded...fan (for multiband)...

While searching I ran across an interesting dipole. It's made entirely out of coax and supposedly is nicely broad-banded and efficient.Anyone has any experience with this type of antenna good/bad I'd like to hear it.

A "bazooka" has about the same bandwidth with the coax connected as a stub as it does with the coax connected just as a regular fat wire (center not used). It also has about the about the same field strength.

The bandwidth comes a little bit from outside conductor and dielectric loss (braided conductor with vinyl jacket), a little bit from being thick, and a little bit from stub loss.

If you just use a thick conductor, bandwidth gets better.

If you fan the conductors apart and use two conductors on each side, it can cover the whole band with coax feed with reasonable SWR and no extra loss.

Copyright 2000-2018 eHam.net, LLC
eHam.net is a community web site for amateur (ham) radio operators around the world.
Contact the site with comments or questions.
WEBMASTER@EHAM.NETSite Privacy Statement